The SIM card has, traditionally, been owned by the MNO/MVNO. If you want to switch the carrier, you have to switch the SIM, too. But that’s changing. The arrival of embedded SIMs, or eSIMs, which can operate globally, support multiple subscriptions, and can be remotely programmed for new subscriptions, takes SIM ownership from the MNO/MVNO and gives it to the device user. The benefit to smartphones is clear – it’s easier to initiate and manage subscriptions but what about in the Internet of Things (IoT)? There are some compelling use cases, but early adopters can expect some extra work, since the eSIM ecosystem is still very young.